Combined valve and valve seat cutter



April 26, 1932. E. o STARK IN 1,356,002

COMBINED VALVE AND VALVE SEAT CUTTER Filed May 31, 1950 2 Sheets- Sheet'1 llllllllllllllfi'l Ap 1 E. o. STARKIN 2- COMBINED VALVE AND VALVESEAT CUTTER Filed May 51, 1930 2 Sheets-Sheet 2 TM WW attowq PatentedApr. 26, 1932 UNITED STATES EMIL O. STARKIN, OF METUCHEN, NEW JERSEYCOMBINED VALVE AND VALVE SEAT CUTTER Application filed May 31, 1930.Serial No. 458,338.

This invention relates to improvements in valve and valve seat cutters,and more particularly to a device which will out both the valve and itsseat at one operation.

62- An objectofthe invention is to provide an improvedvalve and valveseat cutter which willsbe so constructed and arranged that by utilizinginterchangeable cutter orfiling elements, the same may be used forradius cutting or angle cutting.

I Another object of the invention is to provide an improved valve andvalve seat'cutter which. will be so constructed and arranged that'aplurality ofta-ngles may be cut at the 16 same operation, as for examplewhen cuttin avalve seat, two 'fi'fteen'degree angles and a forty fivedegree angle may be simultaneously ground by merely placing the propercutting elements within the device, prior to 20 the actual grindingoperation.

A furtherobject ofthe invention is to providean improved valve andvalveseatcutter which :will be provided with means for positivelyandidefinitely speedingup or retarding the cutting operation asdeslred'dependingupon thecharacter of work being done;

A still further object of the invention is to provide an improved valveand valve seat cutter whichwill be highly eificient in operationandwhich will be quite inexpensive to manufacture;

Other'objects will appear as the description proceeds.

In the accompanying drawings which form a part of-my application,

Figure l is a side elevation. ofmy improved device used in.a.stand uponabench when a used only as avalve cutter;

Figure 2 is a plan View of my improved valve and valve seat cutter;

Figure 3 'is a perspective View of'a radius cutting, roll as used in mydevice;

Figure 4Lis a perspective view of a plain cutting roll as used in mydevice;

Figure 5 is a vertical sectional viewtaken throughthe'cuttin'g devicewhen used as a valve seat grinder;

Figure fi is an elevation-of a hand brace and universal connection usedto operate the cutting device;

Figure 7 isa group perspective of the several parts received within thebody portion of the cutter used for tensioning the cutting rolls;

Figure 8 is a sectional view through the tension screw showing aninterchangeable bushing within the same for positively supporting avalve stem;

Figure 9 is an elevation of a multi-angular cutting roll,

Figure 10 is an elevation of a modified form of multi-angular cuttingroll, and

Figure llis a plan view of my universal head connection.

Like characters of reference are used throughout'the followingspecifications and the accompanying drawings to designate correspondingparts.

In carrying out my invention, I provide a substantially cone-shaped body1 having a depending hollow shank portion 2, which is adapted to enterthe valve passage in the engine cylinder 3, when the valve 4 is removed.

The body 1 is provided with a plurality of radially extending slots orpassages, in which the interchangeable cutting rolls 5 are adapted to bereceived. It will be clearly seen from the drawings that the thicknessof the body 1 is less than the diameter of the rolls 5, and thereforethe rolls will extend beyond the inner and outer surfaces of the body toprovide an effective cutting surface to cut the valve 4 and valve seat6, respectively.

A cover cap or ring 7 is adapted to be removably secured to the top ofthe body 1, and is provided with a plurality of bayonet slots 8 adaptedto cooperate with the screws 'Q'carried by the said body 1. -The ring?serves to prevent the cutting rolls 5 from sliding out of the body, andbeing notched at points 10, provides for the positive reception of thebody within a cylindrical supporting standard 11 mounted upon a bench12, where it is desiredto out only a valve separately from the valveseat.

A plurality of openings are formed about the hollow shank portion 2, toreceive the reduced ends 14 ofthe cutting rolls 5. When no a valve 4 isto be cut separately, the following elements are received within thedepending shank portion 2, namely, a bearing collar 15 which isringshaped and is adapted to be forced up against the depending ends ofthe rolls 5, after which a spring 16 is inserted within the shank. Atension screw 17' is externally threaded and is formed with a centralopening and annular seat adapted to interchangeably receive differentsizes of bushings or guides 18 for varying sizes of valve stems. Thetension screw with its proper size of guide is then screwed into thelower end of the shank 2. It will be apparent that.

when the screw 17 is tightened, a corresponding pressure is brought tobear upon the bearing collar or ring 15 to tension the movement of thecutting rolls 5, as desired. Thus the rolls 5 may be made to rotateslowly or rapid ly depending upon the character of the work being done.

A universal connection link 19 having depending pins 20 adapted to bereceived within corresponding openings in the valve head is provided,and is adapted to be received within a hand brace 21, so that the valvemay be rotated back and forth to effect the cutting thereof.

When the valve seatis to be cut or filed, a somewhat different set ofelements will be received within the shank 2 of the body 1. Assuming theproper cutting rolls 5 are in position within the body 1, the spindlelock nut 22 is placed from the top of the body to extend downwardly intothe shank 2 and is adapted to extend flush with the lower surface of thebearing ring 15, after which the tension screw 17 with itsinterchangeable spindle bushing 23 carried thereby, will be screwed intothe lower end of the shank. The spindle bushing 23 is internallythreaded to receive the threaded upper end of the spindle 24, which alsothreads into the internally threaded spindle lock nut 22, therebyholding the spindle and the body 1 in a substantially rigid assembly,ready to be placed within the valve passage of the engine cylinder forcutting the valve seat. Openings will be made in the upper surface ofthe lock nut 22 so that the depending lugs or pins 20 on the universalconnection link 19 may be received therein, and the cutting body rotatedback and forth, as hereinbefore described.

In Figures 3, 4, 9 and 10 of the drawings, I have illustrated fourdistinct types of cutting rolls 5, which may be used in any desiredmanner in my valve and valve seat cutter. Figure 3 of the drawingsillustrates a radius cutting roll which is used to enlarge the openingbeing cut, while the cutting roll illustrated in Figure l designates theroll used for cutting a forty-five degree angle. The rolls illustratedin Figures 9 and 10 are used when it is desired to out two separatefifteen degree angles at the same operation.

Any or all of the rolls 5 may be formed with reduced opposite ends, andone end he encased in a cap member to snugly fit within the openings inthe upper periphery of the body 1, it being understood that it isnecessary to have the lower ends of the several rolls reduced topositively prevent the same from dropping out from the body.

Many minor changes in detail of construction may be resorted to withoutdeparture from the spirit of the invention.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent of the United States is:

1. A valve and valve seat tool including a plurality of rotary cuttingrolls, a hearing ring engageable with the outer ends of said rolls,tensioning means for applying frictional resistance to the rotation ofthe rolls, said bearing ring cooperating with said tensioning means toprevent endwise movement of the rolls and means for moving thetensioning means towards and away from the rolls.

2. A valve and valve seat tool including a plurality of rotary cuttingrolls interchangeably carried by said tool, a bearing ring engageablewith the outer ends of said rolls, and a cooperating spring seatedbearing ring engageable with the inner ends of said rolls to preventendwise movement of the same.

3. The subject matter as claimed in claim 2, and a tension screwengageable with the spring seated bearing ring for applying the desiredvarying degrees of frictional resistance to the rolls.

4. A valve and valve seat tool including a body, a plurality ofinterchangeable cutting rolls carried thereby, said rolls having aportion of their surfaces extending beyond the inside and outside ofsaid body to dress a valve and valve seat respectively at one operation,a bearing ring engageable with the outer ends of said rolls, tensioningmeans for applying frictional resistance to the rotation of the rolls,said bearing ring cooperating with said tensioning means to preventendwise movement of the rolls and means for moving the tensioning meanstowards and away from the rolls.

5. The subject matter as claimed in claim 4, and an interchangeablevalve stem guide carried by said tensioning means.

6. The subject matter as claimed in claim 4, and an interchangeablespindle bushing carried by said tensioning means, a pilot positivelysupported by said spindle bushing and extending into said body, and aspindle lock nut positively attached to the upper end of said pilot.

7 A valve and valve seat tool having a plurality of rotary cutting rollshaving surfaces adapted to grind a plurality of different angles at oneoperation, a bearing ring engageable with the outer ends of said rolls,tensioning means for applying frictional resistance to the rotation ofthe rolls, said bearing ring cooperating with said tensioning means toprevent endwise movement of the rolls and means for moving thetensioning means towards and away from the rolls.

8. The subject matter as claimed in claim 7 said bearing ring beingdetachably secured to said tool to permit the interchange of the desiredtype of cutting rolls.

In testimony whereof I aflix my signature.

EMIL O. STARKIN.

